Software to manage tenant appointments for showing

[Buyan Thyagarajan]

Hi Guys,

My rental unit is getting vacant this week. I have so many requests from Zillow and i am trying to work on schedules with prospective tenants so that I can show them on a predetermined time. Most of the tenants have just phone numbers and no emails. Is there any free software you guys use to manage prospective tenants visits, appointments which can sync to my outlook or gmail calendar please?

Buyan